I read somewhere about how you can have your packages shipped to any post office by writing “General Delivery” under your name, and the address of the post office, and you don’t need a PO Box to do it. They hold the package at the post office for you / for a period of time / and you pick it up there. Perhaps you have to show them an ID when you pick it up. I’ve never tried it so I can’t elaborate on the process. Obviously the post office would be aware of your name and the return address listed on your packages, and your facial biometrics would be captured by the web of cameras installed in the post office, but I think this basically solves for the issue you’re asking about (?).